shell:$ nslookup -timeout=2 -retry=1 'pt.duolingo.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	pt.duolingo.com
Address: 52.200.251.0
Name:	pt.duolingo.com
Address: 100.52.145.32
Name:	pt.duolingo.com
Address: 98.94.116.37
Name:	pt.duolingo.com
Address: 23.21.252.48
Name:	pt.duolingo.com
Address: 98.95.116.26
Name:	pt.duolingo.com
Address: 98.95.16.234
Name:	pt.duolingo.com
Address: 54.243.157.122
Name:	pt.duolingo.com
Address: 107.22.238.120